/Engine/Plugins/Experimental/GeometryScripting/Source/GeometryScriptingCore/Public/GeometryScript/MeshBasicEditFunctions.h
Adds a new vertex to the mesh and returns a new Vertex ID (NewVertexIndex).
static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * AddVertexToMesh ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, FVector NewPosition, int & NewVertexIndex, bool bDeferChangeNotifications )